CVE-2026-66400

Grav Login Plugin versions before 3.8.13 contain an insufficient session expiration vulnerability in TokenStorage.php where the findTriplet() method fails to properly validate Remember Me token timestamps. Attackers with a captured Remember Me cookie can authenticate indefinitely instead of the configured timeout period, as the expiry check compares an array to a scalar value which always evaluates incorrectly in PHP.

CVSS 4.0

6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-25)

CWE

CWE-613

Published

2026-07-29

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• https://github.com/getgrav/grav/security/advisories/GHSA-mj78-8gwc-vxjj
• https://www.vulncheck.com/advisories/grav-login-plugin-before-insufficient-session-expiration
• https://github.com/getgrav/grav/security/advisories/GHSA-mj78-8gwc-vxjj

Check your stackJSON